Gyruda, Doom of Depths + Mortuary + Phyrexian Altar
Gyruda, Doom of Depths
Mortuary
Phyrexian Altar
Requires
Gyruda, Doom of Depths must be in hand, or in the command zone.
Mortuary must be on the battlefield.
Phyrexian Altar must be on the battlefield.
Mana needed: 
plus enough mana to pay for commander tax, if applicable
plus enough mana to pay for commander tax, if applicable
Steps
- Cast Gyruda by paying and commander tax, if applicable.
- Gyruda enters the battlefield, triggering its ability.
- Holding priority, activate Phyrexian Altar by sacrificing Gyruda, adding one mana of any color.
- Gyruda dies, triggering Mortuary, putting Gyruda on top of your library from your graveyard.
- Resolve the Gyruda ability from step 2, causing each player to mill four cards and you to return Gyruda from your graveyard to the battlefield.
- Repeat from step 2.
Results
Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mill. Infinite sacrifice triggers. Infinite self-mill.
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